Ever since two New York speculators, the Allen brothers, founded Houston on a swamp in 1836 and marketed it as "a center of government and commerce" with an "abundance of excellent spring water and enjoying the sea breeze in all its freshness," the Bayou City has been a developer's dream. Our special series, Real Estate Confidential, examines what's happening in the world of real estate in Houston today. Among the topics: A look at a new planned community that emphasizes sustainability, a talk with neighbors who are fighting for protections in a city without zoning, and practical tips on buying and selling a home. Also, CultureMap editor-at-large Shelby Hodge looks at some of the most interesting residences on the market.